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CVE-2026-80616: ieee802154: Avoid calling WARN_ON() on -ENOMEM in cfg802154_switch_netns()

criticalCVSS 9.8CVE-2026-80616

CSIRTS triage

vendor: Linuxproduct: Linux KernelDenial of service
What
The IEEE 802.15.4 configuration subsystem calls WARN_ON on memory allocation failure in cfg802154_switch_netns, which can trigger kernel panic.
Who is affected
Systems running Linux kernel with IEEE 802.15.4 support and network namespace functionality.
Urgency
Critical severity (CVSS 9.8); immediate patching required as this can cause denial of service through kernel panic.
Action
Apply kernel security patch addressing CVE-2026-80616 immediately when available from your distribution.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.8
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80616

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-80616coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for ieee802154

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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